ACTIVITY-COEFFICIENT CALCULATIONS APPLIED TO ZNCL2 IN LICL MEDIA - DISTINCTION BETWEEN THE REAL ACTIVITY-COEFFICIENT AND THE EFFECT OF COMPLEXATION

The values of the formation constants of the zinc-chlorocomplexes in L iCl media at different ionic strengths have been evaluated from litera ture data on perchlorate media by using the specific interaction theor y, SIT. The distinction between the real or stoichiometric activity co efficient of the electrolyte ZnCl2 and the contribution from the forma tion of complexes in the experimentally measured mean activity coeffic ient, resulting from varying the ionic strength, has been made on the basis of the SIT theory. Values of the formation constant for the comp lexes at infinite dilution, as well as interaction and salting coeffic ients, are also given.